Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Guenter Knapp"'
Autor:
Lucas Schmidt, Helmar Wiltsche, Cezar A. Bizzi, Erico M.M. Flores, Sandra M. Cruz, Guenter Knapp, Paul Tirk, Flávia Michelon Dalla Nora
Publikováno v:
Fuel. 160:108-113
Diesel oil sample preparation for further sulfur determination in fuels is considered a critical step during the analytical sequence mainly due to the high volatility of this sample. Combustion systems have been a suitable alternative to conventional
Autor:
Guenter Knapp, Fabio A. Duarte, Erico M.M. Flores, Regina C. L. Guimarães, Paola A. Mello, Juliana S.F. Pereira, Maria de Fátima Pereira dos Santos, Valderi L. Dressler
Publikováno v:
Energy & Fuels. 23:6015-6019
The microwave-induced combustion (MIC) method was applied for digestion of crude oil vacuum distillation residue for further chlorine determination. Ignition was performed by microwave radiation using a microwave oven designed for conventional pressu
Autor:
Guenter Knapp, Juliana S.F. Pereira, Diogo P. Moraes, Valderi L. Dressler, Paola A. Mello, Erico M.M. Flores, Fabio A. Duarte
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 64:554-558
In this study, microwave-induced combustion (MIC) of extra-heavy crude oil is proposed for further chlorine and sulfur determination by inductively coupled plasma optical emission spectrometry (ICP OES). Combustion was carried out under oxygen pressu
Autor:
Helmar Wiltsche, Guenter Knapp
Flow digestion systems can be classified broadly by the pressure and temperature within the digestion zone, by means of heating and by the flow program of the carrier flow. In this chapter, the working principle and application of each class is discu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67b57d2f6f3b112ca40c48d8273ee4a3
https://doi.org/10.1016/b978-0-444-59420-4.00009-x
https://doi.org/10.1016/b978-0-444-59420-4.00009-x
Autor:
Fatai Aborode, Kenneth Amayo, Marco A.Z. Arruda, Juliano S. Barin, Ramon M. Barnes, Cezar A. Bizzi, Herbert S. Barbosa, Fabio A. Duarte, Abdelkarem Elgazali, Mohamed F. Ezzeldin, Peter A. Fecher, Joerg Feldmann, Érico M.M. Flores, Zuzana Gajdosechova, Ricardo A. Guarnieri, Guenter Knapp, Maria das Graças A. Korn, Francisco J. Krug, Eva Krupp, Mohamed M. Lawan, Lidiane R.V. Mataveli, Henryk Matusiewicz, Paola A. Mello, Márcia F. Mesko, Diogo P. Moraes, Edson I. Müller, Joaquim A. Nóbrega, Ana R.A. Nogueira, Pedro V. Oliveira, Juliana S.F. Pereira, Asta H. Petursdottir, Andrea Raab, Dário Santos Júnior, Gerhard C. Schlemmer, Kerstin S. Schoeberl, Helmar Wiltsche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2331436b0ed553f35ef1ebe0d321698d
https://doi.org/10.1016/b978-0-444-59420-4.01002-3
https://doi.org/10.1016/b978-0-444-59420-4.01002-3
The introduction of a microwave-assisted ultraviolet (MW-UV) digestion method has been considered a promising alternative for sample preparation field. The main characteristic of this system is the possibility to combine closed vessel wet digestion a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cb4cba5d3615cc418f3a1eb1a31f637
https://doi.org/10.1016/b978-0-444-59420-4.00007-6
https://doi.org/10.1016/b978-0-444-59420-4.00007-6
Autor:
Valderi L. Dressler, Marcia F. Mesko, Cezar A. Bizzi, Guenter Knapp, Paola A. Mello, Erico M.M. Flores
Publikováno v:
Analytical and bioanalytical chemistry. 398(2)
Iodine determination in food samples was performed by inductively coupled plasma mass spectrometry (ICP-MS) after digestion by microwave-induced combustion (MIC). Sample masses up to 500 mg of bovine liver, corn starch, milk powder, or wheat flour we
Autor:
Guenter Knapp, Diogo P. Moraes, Liange O. Diehl, Marcia F. Mesko, Valderi L. Dressler, José N. G. Paniz, Juliana S.F. Pereira, Erico M.M. Flores
Publikováno v:
Analytical and bioanalytical chemistry. 397(2)
In this work, three sample preparation methods were evaluated for further halogen determination in elastomers containing high concentrations of carbon black. Samples of nitrile-butadiene rubber, styrene-butadiene rubber, and ethylene-propylene-diene
Autor:
Erico M.M. Flores, Guenter Knapp, Valderi L. Dressler, Diogo P. Moraes, Paola A. Mello, Juliana S.F. Pereira
Publikováno v:
Journal of Analytical Atomic Spectrometry. 24:911
Microwave-induced combustion (MIC) was applied for digestion of crude oil distillation residues for further total nickel, vanadium and sulfur determination by inductively coupled plasma optical emission spectrometry (ICP OES). Sample masses up to 500
Publikováno v:
Journal of Analytical Atomic Spectrometry. 22:1083
Hydride generation (HG) coupled to a simultaneous multi-element axially viewed inductively coupled plasma atomic emission spectrometer (ICP-CCD-AES) was used to determine trace contaminants (